Relay



Feb. 10, 1925. 1,526,236

I w. osscmws v RELAY.

Filed Nov. 12, 1921 Wk'wmfiowarr agggi Patented Feb. 10, 1925.

WQILIJMER OiiiF-lGRANS,v OF; NE YQRK, N; Y.

RELAY.

Application filedN'ovember 12, 1921., Serial No; 514,681;

To all-v ii am it may concern Be it knowirtliat I, \ViLLIAM Rosecrans, a citizen of the United" States, residing at New York city, in the county of' New- York and State OfNe-w York, have invented new and useful Improvements in Relays, of which thefollowing, is a. specification;

This invention relates to relays and is particularly intended for use in closed circuit work, where it is especially adapted for use in alarms.

The principal object is to provide a relay normally connected in a closed circuit, the cores of which are utilized for normally supporting the switch member in open condition.

Another object is to produce automatic means whereby the breaking of a closed circuit may effect the closing of an alarm circuit.

Another object is to produce a device of this nature which shall be simple of'construction, cheap to manufacture and highly eflicient for the purpose for which it is designed.

lVith these and other objects in view, the invention resides in certain novel construction and combination and arrangement of parts, the essential features of which are hereinafter fully described, are particularly pointed out in the appended claims, and are illustrated in the accompanying drawing, in which V Figure l is a top plan view of the preferred form of the invention.

Figure 2 is a sectional view taken on the line 22 of Figure 1.

Figure 3 is a diagrammatic view showing how the various devices are connected in their circuits.

Figure 1 is a sectional view taken on line 4fl: of Figure 1.

Figure 5 is a fragmentary view of a modified form of the device constructed for vertical movement.

Like characters of reference refer to like parts in all views.

Referring to the drawing in detail, 10 represents a base which may be of any suitable material and from which brackets 11 rise. There are four brackets 11 arranged in two pairs, the pairs supporting coils 12. The coils are connected by a wire 13, and each coil is connected by a respective wire to a respective pole of a battery 15. Either or both of the wires 1st may be provided with switches on circuit breakers l6 wl'iereby the-circuit throi-ighthe-roils may be broken, these switches being connected with doors orwindows in: the caseofburglar alarms. Mounted} in eaclr of the coils 12 is al core comprising an; enlarged head portion: 17 curvedatr18andflattenedat 191 The core also comprises a wire; stem; 20 a the free end of which is provided with an adjusting nut 21 and set screw whereby the degree of possible movements of the core is limited. lVhen the circuit of the battery 15 is closed through the two coils the heads 17 which face each other and are arranged a short distance apart are drawn together with the parts 19 contacting. Core sleeves 32 are connected by aconducting bracket member 33.

As shown in Figure l a crescent shaped switch member 22 is pivotally mounted at one end as at 23 to a bracket 24 which is supported by the member 10. Switch base member 22 is in circuit with the battery 20 through the medium of a wire 25 which is connected to the bracket 24, the other pole of the battery is connected by a wire 27 with a contact terminal 28. Member 22 has its free end 29 normally overlying contact member 28; and member 22 is provided midway its ends with a depending finger 30 which normally rests against curved portion 18 of the heads 17 as shown in Figure 4 of the drawings.

It will be obvious that when the circuit through the coils is closed, the members 17 will be drawn together under the finger 30 and will support the finger 29 out of contact with member 28. hen one of the switches 16 is opened so as to break the circuit or when the battery 15 becomes ex hausted the cores 17 will be forced back and member 22 will drop so that finger 29 will contact member 28 and thus, closing the circuit through the battery 26 and a bell 31 or other audible alarm, will effect operation of the latter.

In Figure at the member 22 is shown as a sliding rod mounted in bearings 32 which direct it against the heads 17 contact 28 being arranged directly below the heads. In this case the member 22 merely slides down through the bearings 32 into contact with a member 28 upon the breaking of the primary circuit.

lVhile I have described what I deem to be the most desirable embodiment of my invention, it is obvious that many of the details may be varied without in any way departing from the spirit of my invention, and I therefore do not limit myself to the exact details of construction set forth nor to'anything less than the whole of my invention limited only by the appended claims.

What is claimed as new is l. A device of the class described coniprising a pair of electro-magnets, cores mounted therein, the heads of said cores having a flat surface and a curved surface, the said flat surfaces of said cores contacting with each other when the magnets are energized, a switch member supported by said curved portion of said heads, whereby upon the deenergizing of said magnets will cause said switch member to close a normally open circuit.

2. A device of the class described comprising a pair of electro-magnets, cores mounted therein, the free ends of said cores contacting with each other upon energizing of said magnets, a switch member having end legs, and an intermediate leg which rests upon the free ends of said cores, :1 contactarranged in the path of movement of one of the end legs, whereby upon the deenergizing of said magnets permits the co action of said leg with said contact for 3 closing a normally open circuit.

In testimony whereof. I have aflixed my I signature.

WILLIAM ROSEGRANS. 

